Bed plate



Jan. 1, 1935. v A. J. ALLISON BED PLATE -2 Sheets-Sheet 1 Filed Feb. 24, 1932 INVENTORL A 'rromviya Jan. 1, 193 5. A. J. ALLISON 1,986,660

5 BED PLATE Filed Feb. 24, 1932 ZSheets-Sheet 2 mmxx- INVENTOR, F/& '7

A TTORNE VS.

Patented 1:935

JJ; Dayton, Dhigti, assignor ,to Smronds Worden #White j Com any, Daytomf e et i n??? w.

Application February 'fi, 1932 Serial 594,7!)( i I 4 feline 1;;(01392 22) This invention relates.to sbedlplates formant After the'metal parts of my-bed plate areasbeating engines; suchas areused in. the prepara-l sembledth'e spaces 14 are'fi'lled with an abrasive tiorifxof,stuffifHpulw forsmaking'ipaperl s compound" substantially the same as is used in --Beatixig engines. andifbed't plates forhbeatingi. 'making grinding wliee lsikThe bars lO are hard 5 engines being'wellaknown; itiisineedless-atathis" ened by heat treatment, and'fon this reason I time to describe either further than .ztol explains. use an abrasive compoundthat can be hardened thee particularslwhereinilrnylimproved bed {plate at a temp'erature' which willnot destroy the heati difi ers-ifrom-othersw in L 1 treatment of the 'bar's. Whilethere are various- "(Whilemy bedplatainicommonwith most other. compositions that' wouldansw'erthe purpose I ;bed:plates;icomprisesiarplurality of metali-bars? have obtained'satisfactory results with granular 16 lfi between the bars fare: left unfilled; With this Aniixtur e of aluminou's oxide andRedrnanol is l assembledintoa umtsmyplatediffersiromiothers aluininous oxidebonded with 'one of the -well inthat thespacesibetweenthe barsarefilled with" known: synthetict'resins, a dmanolyror example; an abrasive material; where. others are filled with resin can be hardened at 356 which tern- :stripsofwood, or,i as= in some,leases, the. spaces perature will not arrest the hardened metal bars;

brief preface Ishall proceed to describe my impressed into the spaees-iaiter which the bedp'late" provedibed matevm detail, with the aid of the is baked in an oven long enough to convertthe accompanying drawings, inwhich v resin into a hard insoluble bond. Preferably the Fig. 1 is a plan view of one form of my imbars 12 are not hardened. The advantage of this proved bed plate; 1 is that the first bar in the ensemble, that is, the 20 Fig. 2 is an elevationalview of the plateQwith a bar the fiy bars in thebeater roll first engage, portion of the outer bar removed; quickly wears toa shapebe st adapted to its func Fig. 3 is transverse sectional View; 1 tion, so it can ease the fly bars onto the hardened Fig. 4' is a fragment of one of the corrugated bars of the'bed plate. As 'it is not always certain bars;

Fig. 5 isa plan view of another form of my of straight bed platesforinstance,,this dependimproved bed plate; p f ing upon which way the bedplatelis put in the Fig. 6 is an elevational View with part of one machine, both bars 12 are left unhardened. outside bar removed; 1 Usually the active part of a bed plate is, the

Fig. 7 is a sectional end elevation, and bars, and an important function of the bars is to 30 Fig. 8 is a fragment of one of thecorrugated cut and bruise the-fibers of the stock. In my bars. l improved bed plate the abrasive filling is the Referring first to Figs. 1 to 3 it is seen that the more important active element and its action bed plate is built up witha plurality of metalbars upon the fibers is, called brushing or broom- 10, separated by square blocks or washers 11. 1 On ing, these being terms well established in the art. 35

each side, of this group of bars 10- is a bar12, the". The abrasive element is protected from the bars entire structure being united by bolts 13. The of the beater roll] by the hardened bars 10, while spaces libetween the bars 10 are filled with an the beater bars drag the stock across the abrasive abrasive material, aswill be more fully explained surfaces. As is seen. in Fig. 3, the abrasive ele- $01 presently. ments soon wear to a level slightly below the edges As shown in Fig. 1, this bed plate has a bend at of the bars, forming a condition which produces its center, with the result that the bars of the a very desirable effect on the stock. The prox beater roll with whichthis bed plate cooperates imity of the abrasive elementsto the bar edges will first engage the ends of the bars 10, the points restricts without wholly preventing the bars out:

which of the bars 12 will be the first, m the case 25 of contact gradually moving toward thecenter or ting andbruising the fibersgwhile the bars serve 45 apex of the bars It is also to be noted that the to break up bunches of fibers, thereby exposing portion of eachbar 10 above the washers:11 is individual fibers to the action of the abrasive corrugated, making the upper edges of the bars elements.

10, and the spaces 14 between them, sinuousvin I shall now describe the structure shown in form. The idea of bending a bed plate as here Figs. 5 to 8. In this construction I use hardened 50 shown is notnew, but it has a special function steel bars 20, which are corrugated from edge here in that it prevents ,bars in the beater roll to edge. By corrugating contiguous bars oppofrom coming into direct contact with theabrasive sitely and placing opposed corrugations in confilling in the spacesfll. This point willbe retact, a, plurality of approximately diamond ferred to further presently. shaped cells is formed. On each side of the .55

group of corrugated bars I place a clamping bar 21, the whole being bound together with bolts 22. I fill the cells 23 with an abrasive compound such as has already been described.

Obviously, all that I have said regarding the purpose and operation of the structure shown in Figs. 1 to 4 is applicable to the structure shown in Figs. 5 to 8. Oneadditional difference in the two structures isto be noted, however, namely, that the latter is straight. This difference is not fundamental though, as the cellular struc-.

ture can be built into a bent plate, while the structure shownin Figs. 1 to 4 may be made.

straight if desired. In the latter case the corrugations should be made deeper, so that the corrugations' of one bar will extend into the spaces between corrugations in *thereby preventing the bars of the beater roll the contiguous bar,

getting into spaces between the bars of the bed plate.

While I have shown only two forms of my invention it is not to be thought the invention'is limited-to these, as various modifications thereof the holesin the bars 10 and, 12.

7 would. form bottoms, forthe spaces to-protect'by a patent is as follows:

Having fully described my invention, and described two embodiments thereof, what I 1 claim and desire 1. A bed plate comprising a plurality of hardened steel bars set on edge and assembled with spaces between them, an unhardened bar on each side of the unit thereby formed, and abrasive material whereby said spaces are filled.

2. A bed plate comprising a plurality of metal bars set on edge and assembled with spacers between them, whereby said plates are maintained in separated relationship, said bars being flat, save the upper portion of each bar, which is corrugated so the upper edges of the bars are sinuous in form, the spaces between said bars being filled with abrasive material.

3. A bed plate comprising a plurality of steel bars set on edge and assembled with spacers between them, wherebysaid plates are maintained in separated relationship, said bars being fiat, save the upperportion of each bar, which is corrugated so the upper edges of the bars are sinuous in form, said bars being hardened by heat treatmenathe. spaces between the bars being filled with abrasive: material comprising a,

synthetic bonding material capable of being hardened in situ by means of heat at a temperature below that which will afiect the heat treatment of the bars. I

4. A bed plate comprising a piurautyef hardened steel bars set on edge and assembled with spaces between them, anwunhardened bar on' each side of the unit thereby formed, and abrasive material whereby said spaces are filled, said ma-; terial comprising a synthetic bonding material capable of being hardened in situv with heat at a temperature below that which will afiect the hardness of the hardened steel bars.

ALBERT J. ALLISON. 

